21. A: It’s 2:00 a.m. ______ have you worked on the math report?B: Since 9:00 last night.(A) How soo

問題詳情

21. A: It’s 2:00 a.m. ______ have you worked on the math report?B: Since 9:00 last night.
(A) How soon
(B) How long
(C) How often
(D) How many

答案：B
難度：適中0.4
統計：A(2),B(2),C(1),D(0),E(0)